That's nice, but I'm getting a lot of empty lines with that command. The issue is that I'm using the * wildcard, which will match zero or more instances of a capital letter. I need to use the + wildcard, which will match one or more instances of a capital letter.

Expanding the Virtual Disk

Great, now I have expanded my drive to 45G. That should be plenty. Worked like a charm!

Windows Denies Those Changes

I can see the larger disk in the VirtualBox settings. It's there. I'm looking right at it, yet Windows just denies it's existence and reports the original 25G.

After using this as an opportunity to hate on Windows I decide to actually look into the issue. The second result in my search gave me the answer I was looking for. It turns out that this is an issue with VirtualBox and not Windows. "You can only resize disks if they are not part of a VM that uses snapshots".

The Solution

clone the Windows VM to a new VM

perform the VBoxManage command above, to the new VM

boot the new VM

expand the partition in Windows

download everything I can find and use all of this new space!

This eliminates any old snapshots. Maybe I could have just deleted them, I don't know. The process took about 15 minutes, including waiting for VMs to clone and disks to resize. Not bad.